add concept of a branch to the API

This is really just a wrapper around refs, but you can refer to branches
in a much nicer manner ('master' or 'origin/master' for example)

1 files changed, 84 insertions, 0 deletions

diff --git a/LibGit2Sharp/BranchCollection.cs b/LibGit2Sharp/BranchCollection.cs
new file mode 100644
index 00000000..276a1b84
--- /dev/null
+++ b/LibGit2Sharp/BranchCollection.cs
@@ -0,0 +1,84 @@
+#region  Copyright (c) 2011 LibGit2Sharp committers
+
+//  The MIT License
+//  
+//  Copyright (c) 2011 LibGit2Sharp committers
+//  
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//  
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//  
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+#endregion
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+
+namespace LibGit2Sharp
+{
+    public class BranchCollection : IEnumerable<Branch>
+    {
+        private readonly Repository repo;
+
+        public BranchCollection(Repository repo)
+        {
+            this.repo = repo;
+        }
+
+        public Branch this[string name]
+        {
+            get
+            {
+                var tokens = name.Split('/');
+                if (tokens.Length == 1)
+                {
+                    return Branch.CreateBranchFromReference(repo.Refs[string.Format(CultureInfo.InvariantCulture, "refs/heads/{0}", name)]);
+                }
+                if (tokens.Length == 2)
+                {
+                    return Branch.CreateBranchFromReference(repo.Refs[string.Format(CultureInfo.InvariantCulture, "refs/{0}", name)]);
+                }
+                throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Unable to parse branch name: {0}. Expecting local branches in the form <branchname> and remotes in the form <remote>/<branchname>.", name));
+            }
+        }
+
+        #region IEnumerable<Branch> Members
+
+        public IEnumerator<Branch> GetEnumerator()
+        {
+            var list = repo.Refs
+                .Where(IsABranch)
+                .Select(Branch.CreateBranchFromReference);
+            return list.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        #endregion
+
+        private static bool IsABranch(Reference reference)
+        {
+            return reference.Type == GitReferenceType.Oid
+                   && !reference.Name.StartsWith("refs/tags/");
+        }
+    }
+}
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